57279811 has 4 divisors (see below), whose sum is σ = 58827952. Its totient is φ = 55731672.

The previous prime is 57279809. The next prime is 57279823. The reversal of 57279811 is 11897275.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57279811 - 2¹ = 57279809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57279011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774015 + ... + 774088.

It is an arithmetic number, because the mean of its divisors is an integer number (14706988).

Almost surely, 2^57279811 is an apocalyptic number.

57279811 is a deficient number, since it is larger than the sum of its proper divisors (1548141).

57279811 is a wasteful number, since it uses less digits than its factorization.

57279811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548140.

The product of its digits is 35280, while the sum is 40.

The square root of 57279811 is about 7568.3426851590. The cubic root of 57279811 is about 385.4788240412.

The spelling of 57279811 in words is "fifty-seven million, two hundred seventy-nine thousand, eight hundred eleven".